DouKaku?

import java.io._

object FileUtil {
  def removeFilesBySuffix(d:String, s:String):Unit = {
    removeFilesBySuffix(new File(d), s)
  }
  def removeFilesBySuffix(d:File, s:String):Unit = {
    d.list.foreach(f => {
      val c = new File(d, f)
      if(c.isDirectory) removeFilesBySuffix(c, s)
      else if(f.endsWith(s)) c.delete
    })
  }
}